Question 2030 of 236 · California Water Treatment Operator Exam
In chloramination, the typical weight ratio of chlorine to ammonia-nitrogen used to form monochloramine is about
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Correct answer to question 2030
- D: 3 to 1 up to 5 to 1
Explanation
EPA guidance recommends a chlorine to ammonia-nitrogen weight ratio of about 3:1 to 5:1 to favor monochloramine. Above 5:1 dichloramine can form (slowly), and above about 7.6:1 trichloramine can form, both causing taste and odor problems.
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